Device for preventing side play of bearing chocks



My a? March 13, 1956 J. A. CAMPBELL 2,738,239

DEVICE FOR PREVENTING SIDE PLAY OF BEARING CHOCKS Filed Sept. 25, 1953 FlEl- /0 FIE- E- a W A v a; /iqt M v llllll lllll [mentor Jay/v4 C4MPZELL,

DEVICE PREVENTING SIDE PLAY OF BEAR-INGCHOCKS I John A. Campbell, Pittsburgh, Pa., assignor to United States SteelCorporation, a corporation of New Jersey Application September 25,1953, Serial No. 382,360

. 8 Claims. .(Cl. abs-22 This invention relates to an improved device for preventing side play of bearing chocks. 1

Metal strip in continuous processing lines often travels over or under rolls, which can be either driven or idlers. There is a problem in keeping such rolls running true with respect to the direction of strip travel. Any looseness between the bearing checks and their housings aggravates this problem by causing misalignment of the roll axis with respect to the desired direction of strlp travel, a condition sometimes known as crossed rolls. When the rolls do not run true, the strip weaves.

An object of the present invention is to provide an improved and simplified means for mounting abearrng chock in a housing and securing the chock against side la p A further object is to provide an improved mounting means which can be used either for single rolls or for rolls arranged in pairs or other rotatable elements and efiectively eliminates any side play of the chocks or bearings.

In accomplishing these and other objects of the invention, I have provided improved details of structure, preferred forms of which are shown in the accompanying drawing, in which:

Figure 1 is an elevational view of a roll housing and a portion of a roll in which the chock is mounted 1n accordance with my invention;

Figure 2 is a vertical section on a larger scale taken on line II--II of Figure 1, the housing being shown in elevation;

Figure 3 is a horizontal section taken on lme IIIIII of Figure 2; and

Figure 4 is an elevational view, partly In section, of a modification.

Figures 1, 2 and 3 show the mounting means of my invention applied to a single roll, such as a deflector roll or sink roll in a strip processing line. These figuresshow a housing 10, which contains the usual window 12, a chock 13 vertically movable in said window, and a roll 14 rotatably mounted in said chock. The chock rests on a vertically movable adjustment screw 15 which is threadedly engaged with the lower part of the housing and held in place by a lock nut 16. The opposite end of the roll would have similar support means, not shown.

In accordance with my invention, the inside faces of the housing 10 carry opposed vertically extending tongues 17 and 18 and the side faces of the chock 13 contain vertical grooves which receive said tongues. The upper face of the chock contains a horizontal groove which extends about half way across and terminates in a wedge surface 19. A key 20 is mounted for horizontal sliding movement in this groove and terminates in a wedge surface 21. Thus the wedge surfaces 19 and 21 are opposed and they converge downwardly. A retaining bar 22 is bolted to the top of the chock and extends across the key 20 to hold it in its groove. A bearing screw 23 is threadedly engaged with the upper end of the housing and at its lower end has a frustoconical tip that fits bei United States Patent 2,738,239 Patented Mar. 1956 tween the opposed wedge surfaces 19 and 21. The bearing screw carries a lock nut 24.

In operation, the lower screw 15 is adjusted to position the roll 14 and chock 13 at the desired height. The upper screw 23 is then adjusted downwardly to force its frustoconical tip between the opposed wedge surfaces 19 and 21. This action forces the key 20 outwardly into tight engagement with the tongue 17 to hold the chock against any side play.

Figure 4 shows my mounting means applied to a pair of rolls, such as pinch rolls. The upper chock 13 has a horizontally slidable key 20 and cooperating bearing screw 23 as in the embodiment already described. The bottom face of the lower chock 13a is equipped with a key 20a, similar to the key on the upper chock. The lower adjustment screw is replaced by an upstanding stud 25 which has a frustoconical tip at its upper end. When the upper screw 23 is adjusted downwardly, the tip of the stud 25 also forces the key 20a against the tongue 17 to prevent side play in the lower chock.

While two embodiments of my invention have been shown and described, it will be apparent that other adaptations and modifications may be made without departing from the scope of the following claims.

I claim:

1. In combination, a housing, a bearing chock movably supported in said housing, a rotatable element supported in said chock, and a device for preventing side play of said chock, said device comprising a key mounted in said chock for movement in a direction perpendicular to that in which said chock moves in said housing, said key and said chock having opposed spaced apart wedge surfaces, and a screw threadedly engaged with said housing and having a frustoconical tip fitting between said wedge surfaces and adapted to force said key into engagement with said housing.

2. In combination, a housing, a bearing chock, means supporting said chock in said housing, a rotatable element supported in said chock, and a device for preventing side play of said chock, said device comprising a key mounted for horizontal movement in the upper face of said chock, one end of said key and said chock having spaced apart opposed wedge surfaces, and a screw threadedly engaged with the upper part of said housing and having a frustoconical tip fitting between said wedge surfaces and adapted to force the other end of said key into engagement with said housing.

3. A combination as defined in claim 2 in which the supporting means for said chock includes a vertically adjustable screw on which the bottom face of the chock rests.

4. A combination as defined in claim 2 in which the supporting means for said chock includes a second chock, a support under said second chock, and a rotatable element supported by said second chock and contacting said first named rotatable element.

5. In combination, a housing, a bearing chock, said housing having opposed inwardly directed vertical tongues and said chock having grooves slidably receiving said tongues to enable said chock to move vertically with respect to said housing, means supporting said chock in said housing, a rotatable element supported in said chock, and a device for preventing side play of said chock, said device comprising a key mounted for horizontal sliding movement in the upper face of said chock, one end of said key and said chock having spaced apart opposed wedge surfaces which converge downwardly, and a screw threadedly engaged with the upper portion of said housing and having a frustoconical tip at its lower end fitting between said wedge surfaces and adapted to force the other end of said key into engagement with one of said tongues.

6. A combination as defined in claim 5 in which the supporting means for said chock includes a vertically adjustable screw threadedly engaged with the lower part of said housing, the bottom face of said housing resting on said last named screw.

7. A combination as defined in claim 5 in which the supporting means for said chock includes a second chock, a support under said second chock, and a rotatable elc n ent supported by said second chock and contacting said first named rotatable element.

8. A combination as defined in claim 7 in which said last named support includes an upstanding stud fixed in the bottom of said housing, and a key mounted for horizontal movement in the bottom face of said second chock, one end of said second named key and said second chock having spaced apart opposed wedge surfaces which con verge upwardly, said stud having a frustoconical tip at its upper end fitting between said last named wedge surfaces for forcing the other end of said second named key into engagement with one of said tongues and thereby preventing side play of said second chock.

References Cited in the file of this patent UNITED STATES PATENTS 352,521 Daniels Nov. 16, 1886 426,568 Leverich Apr. 29, 1890 6023564 Matthews Apr. 26, 1898 1,734,793 Bruninghaus Nov. 5, 1929 2,174,195 Norris Sept. 26, 1939 

